An efficient large-scale spiral plate gas purification device

Abstract

The present invention discloses an efficient large-scale spiral plate gas purification device, which includes a device main body. Inside the device main body, there are two groups of outer separation plates and inner separation plates that are rotationally symmetric about the center and have a spiral structure, enclosing a packing channel with a spiral structure. The two packing channels form two ventilation channels with a spiral structure. The peripheries of the two groups of outer separation plates and inner separation plates are fixedly connected with sealing plates, and the sealing plates are fixedly connected with the inner wall of the device main body and divide the device main body into two outer chambers. The two outer chambers are respectively communicated with the ventilation channels. The device main body is provided with an air inlet and an air outlet corresponding to the two outer chambers. The present invention prolongs the gas flow path, ensures sufficient contact between the gas and the packing, guarantees the gas purification treatment effect, improves the gas purification efficiency, can also reduce the use of packing, improves the utilization rate of the packing, reduces the gas operation cost, the device specifications can be flexibly adjusted, the purification treatment ability is strong, and it can be applied to large-scale gas purification devices.

Description

Technical Field

[0001] The present invention relates to the technical field of gas purification equipment, and particularly relates to a high-efficiency spiral plate large-scale gas purification equipment. Background Art

[0002] In the production activities of factories, industries such as metallurgy, thermoelectricity, coking, cement, and ceramic glass require boilers. The gases in industrial kilns, especially coal-fired boilers, contain dust, nitrogen oxides, and sulfur dioxide. The discharge of the above gas components into the atmosphere will cause a series of air pollution phenomena such as smog and acid rain, thus threatening the ecological environment and human health. With the increasingly strict requirements of the country for air pollution control work in recent years, gas desulfurization, denitrification, and dust removal technologies have also been continuously innovated.

[0003] Currently, the commonly used traditional methods for removing NOX include low-nitrogen combustion technology, selective non-catalytic reduction (SNCR), selective catalytic reduction (SCR), etc. Commonly used desulfurization methods include coarse desulfurization with limestone powder at temperatures above 800 °C, low-temperature desulfurization with baking soda powder at 140 - 260 °C, and wet desulfurization. Commonly used dust removal technologies include cyclone coarse dust removal, electrostatic dust removal, bag dust removal, and wet electrostatic dust removal. Among them,

[0004] ① Low-nitrogen combustion technology controls the generation of nitrogen oxides during the combustion process and is generally applied in large-unit coal-fired boilers; however, low-nitrogen combustion technology can only reduce the NOX emission value by about 30%. To further reduce the NOX emission, gas denitrification technology must be adopted.

[0005] ② Selective non-catalytic reduction denitrification technology SNCR is mainly used for gas denitrification of circulating fluidized bed boilers and supporting boilers in waste incineration plants, etc.; its main advantage lies in its small investment and short construction period. However, its efficiency is relatively low, the denitrification efficiency of SNCR is about 25 - 40%, the denitrification agent ammonia water has a high asphyxiation characteristic, and there is a high ammonia escape phenomenon in the tail gas.

[0006] ③ Selective catalytic reduction denitrification technology SCR is mainly used for large coal-fired boilers and is currently the most widely used process with mature technology in gas denitrification. The SCR denitrification efficiency is about 60 - 90%. Although this technology is widely used at home and abroad, it also has obvious defects: high operating costs, ammonia escape and its adverse effects, difficulty in denitrification at ultra-low loads, etc. The reducing agent liquid ammonia has major safety hazards for thousands of liquid ammonia tank trucks transporting raw materials, and liquid ammonia storage tanks are major hazard sources. Using urea decomposition or hydrolysis to replace liquid ammonia as a denitrification technology has disadvantages such as large device investment, high power consumption, water consumption, and steam consumption, serious ammonia leakage during the preparation of the solution, easy crystallization during the transportation of hydrolysis gas, the need for jacket or tracing, and poor operating environment.

[0007] Most traditional purification equipment uses a fixed reaction bed layer, which has a large resistance and a short gas flow path, resulting in insufficient contact between the gas and the catalytic packing, reducing the catalytic reaction effect of the gas, affecting the gas purification effect, and at the same time, a large amount of catalyst is used, resulting in high operating costs. For large-scale purification equipment, the amount of catalytic packing used is even more. At the same time, the reaction bed layer used in the existing purification equipment can only be applied to small purification devices and cannot be applied to large-scale gas purification devices; the purification equipment with multiple parallel moving bed layers also has the problem of uneven distribution of packing feeding. Due to different flow rates of the packing at different positions, there are dead zones in the equipment, and some packing cannot be replaced immediately, affecting the use efficiency of the equipment. Moreover, the controllability of the solid-gas flow rate of each moving bed equipment is poor, prone to uneven flow, resulting in a rapid decline in efficiency and affecting the use efficiency of the catalyst; for the purification equipment with a cylindrical moving bed layer, in the process of large-scale development, the size of the central tube is too large, the space utilization rate in the middle of the central tube is low, the external shape of the equipment is too large, and the larger the gas volume, the lower the space utilization rate of the equipment center, and the comprehensive gas treatment volume of the equipment is limited. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide an efficient spiral plate large-scale gas purification equipment.

[0009] To solve the above technical problems, the present invention includes a device main body. Inside the device main body, there are two groups of spirally distributed packing channels. Between the two groups of packing channels, two groups of spiral-structured air channels are formed in cooperation. The two groups of packing channels are rotationally symmetrically arranged at the center. The packing channels are separated by a spiral-structured outer separation plate and an inner separation plate. Both the outer separation plate and the inner separation plate are air-permeable plates. The peripheries of two groups of mutually inner and outer cooperating outer separation plates and inner separation plates are fixedly connected with sealing plates, and the sealing plates are fixedly connected with the inner wall of the device main body and divide the device main body into two outer chambers. The two outer chambers are respectively communicated with the air channels. The device main body is provided with an air inlet and an air outlet corresponding to the two outer chambers respectively.

[0010] Preferably, at least one group of spirally distributed baffles are respectively arranged in the two outer chambers and the cooperatively communicated air channels, and the baffles are arranged staggeredly along the height direction.

[0011] Preferably, spiral-structured sealing plates are fixedly connected to the upper and lower ends of the outer chambers and the cooperatively communicated air channels. The sealing plates are used to seal the upper and lower ends of the outer chambers and the air channels.

[0012] Preferably, a spirally distributed discharging pipe fitting is arranged at the lower end of the packing channel. The discharging pipe fittings are arranged in butt-jointed sequence. The discharging pipe fitting is a necking pipe fitting composed of discharging plates of different shapes. The discharging pipe fitting is fixedly connected with the bottom sealing plate.

[0013] Preferably, two groups of baffle plates with spiral structures are arranged at the upper port of the filler channel and are symmetrically arranged obliquely. The tops of the two groups of baffle plates are fixedly connected to form a sharp corner structure. The two groups of baffle plates form a flared structure on both sides of the filler channel, facilitating the filler to enter the filler channel.

[0014] Preferably, a feeding assembly and a discharging assembly are respectively fixedly connected to the upper and lower ends of the equipment main body. The feeding assembly feeds materials into the upper end inside the equipment main body in a multi-point feeding manner, and the discharging assembly discharges materials in a multi-point discharging manner and converges and concentrates for discharging, so as to achieve uniform isolation and equal discharging, facilitating the uniform discharging of the filler.

[0015] Preferably, the middle parts of the outer separation plates and the inner separation plates of the two groups of filler channels are butted and the two groups of filler channels are communicated, thereby dividing the two outer chambers and the matched and communicated ventilation channels into two parts, and arranging the air inlet and the air outlet on these two divided parts.

[0016] Preferably, the air inlet and the air outlet are respectively arranged at the upper and lower ends of the equipment main body and are at different ends.

[0017] Preferably, a guide air plate is fixedly connected between the side of the sealing plate close to the inner separation plate and the inner wall of the equipment main body.

[0018] The beneficial effects of the present invention are as follows: The present invention forms a spiral-structured filler channel by two groups of spiral-structured outer separation plates and inner separation plates, which extends the flow path of the gas, ensures sufficient contact between the gas and the filler, ensures the purification treatment effect of the gas, improves the purification efficiency of the gas, can also reduce the use of the filler, improves the utilization rate of the filler, reduces the operation cost of the gas, the equipment specifications can be flexibly adjusted, the purification treatment capacity is strong, and it can be applied to large gas purification equipment; compared with the cylindrical type and the square plate type, it can be made large-sized, can greatly increase the reaction area and the filtration area, reduce the gas-solid two-phase resistance, reduce the equipment height and the floor area, and achieve better reaction effects with lower investment; it is easier to achieve multi-stage, realize multiple gas reactions and multiple redistributions, improve the gas-phase reaction effect, and can greatly increase the solid-phase utilization rate, saving the use cost of the solid-phase material; it is easier to achieve the integration of dust removal and reaction, can replace the solid material arbitrarily without affecting the gas phase and the overall reaction, can avoid the uneven flow of the solid catalyst, and improves the utilization rate of the catalyst. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 is the Figure 1 vertical sectional schematic diagram of the present invention;

[0021] Figure 3 is theFigure 2 Schematic diagram of the horizontal cross-section.

[0022] In the figure: 1. Equipment main body; 2. Packing channel; 3. Ventilation channel; 4. Outer separation plate; 5. Inner separation plate; 6. Sealing plate; 7. Outer chamber; 8. Air inlet; 9. Air outlet; 10. Baffle; 11. Air guide plate; 12. Plugging plate; 13. Discharge pipe fitting; 14. Material retaining plate; 15. Feeding assembly; 16. Discharging assembly. Specific implementation mode

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. All directional indications (such as up, down, left, right, front, back...) in the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0024] As Figures 1-3 shown, in this embodiment, an efficient spiral plate large-scale gas purification device is provided, including an equipment main body 1. Inside the equipment main body 1, two groups of spirally distributed packing channels 2 are provided. Two spiral-structured ventilation channels 3 are formed by the cooperation between the two groups of packing channels 2. The two groups of packing channels 2 are rotationally symmetrically arranged at the center. The packing channel 2 is separated by a spiral-structured outer separation plate 4 and an inner separation plate 5. Both the outer separation plate 4 and the inner separation plate 5 are breathable plates. A sealing plate 6 is fixedly connected to the periphery of the two mutually inner and outer matching outer separation plates 4 and inner separation plates 5, and the sealing plate 6 is fixedly connected to the inner wall of the equipment main body 1 and divides the equipment main body 1 into two outer chambers 7. The two outer chambers 7 are respectively communicated with the ventilation channel 3. A gas guide plate 11 is fixedly connected between one side of the sealing plate 6 close to the inner separation plate 5 and the inner wall of the equipment main body 1. An air inlet 8 and an air outlet 9 corresponding to the two outer chambers 7 are provided on the equipment main body 1. The air inlet 8 and the air outlet 9 are respectively arranged at the upper and lower ends of the equipment main body 1 and are at different ends. And a group of spirally distributed baffles 10 are respectively arranged in the two outer chambers 7 and the cooperatively communicated ventilation channels 3. The two groups of baffles 10 are staggered along the height direction. The setting of the baffles 10 increases the flow path of the gas, enables the gas to fully contact the packing, and thus improves the catalytic reaction treatment effect of the gas. The middle parts of the outer separation plate 4 and the inner separation plate 5 of the two groups of packing channels 2 are butted and the two groups of packing channels are communicated, so as to divide the two outer chambers 7 and the cooperatively communicated ventilation channels 3 into two parts, and thus the air inlet 8 and the air outlet 9 are arranged on these two divided parts. The gas enters the outer chamber 7 from the air inlet 8 and then enters the spiral-structured ventilation channel 3. The gas passes through the two groups of inner separation plates 5 and outer separation plates 4 and fully contacts the packing, thereby realizing the catalytic reaction and removing nitrogen and nitrate compounds in the gas, and improving the processing efficiency and processing effect of the gas.

[0025] As Figures 2-3 shown, sealing plates 12 with a spiral structure are fixedly connected to the upper and lower ends of the outer chamber 7 and the cooperating and communicating ventilation ducts 3 respectively. The sealing plates 12 are fixedly connected to the inner wall of the equipment main body 1. The sealing plates 12 are used to seal the upper and lower ends of the outer chamber 7 and the ventilation ducts 3, so that gas can flow in the outer chamber 7 and the ventilation ducts 3, thereby restricting the gas to only contact the packing through the inner separation plate 5 and the outer separation plate 4, realizing the purification treatment of the gas.

[0026] As Figures 2-3 shown, a discharge pipe fitting 13 with a spiral distribution is provided at the lower end of the packing channel 2. The discharge pipe fittings 13 are arranged in butt joints in sequence. The discharge pipe fitting 13 is a necking pipe fitting composed of discharge plates of different shapes. The discharge pipe fitting 13 is fixedly connected to the bottom sealing plate 12. All the discharge pipe fittings 13 completely cover the lower part of the packing channel 2. When discharging is required, the packing falls simultaneously through several discharge pipe fittings 13, thereby realizing the uniform and synchronous efficiency of the packing. Two groups of spiral-structured and inclined symmetrically arranged baffle plates 14 are provided at the upper port of the packing channel 2. The tops of the two groups of baffle plates 14 are fixedly connected to form a pointed angle structure. The two groups of baffle plates 14 form a flared structure on both sides of the packing channel 2, facilitating the packing to enter the packing channel 2. After the packing enters the interior of the equipment main body 1, it enters the packing channel 2 after being guided by the baffle plates 14. And in order to make the packing feed evenly and discharge evenly and simultaneously, a feeding assembly 15 and a discharging assembly 16 are fixedly connected to the upper and lower ends of the equipment main body 1 respectively. The feeding assembly 15 feeds materials to the upper end inside the equipment main body 1 in a multi-point feeding manner. This multi-point feeding method can adopt the setting of multiple feeding hoppers, and all the feeding hoppers cover the top of the equipment main body 1. The discharging assembly 16 discharges materials in a multi-point discharging manner and converges and concentrates before discharging. After the packing enters the equipment main body 1 through the feeding assembly 15, the packing enters through multiple points and directly enters the packing channel 2 after being shunted by the baffle plates 14. And after the packing fully reacts, it is discharged through multiple points by the discharge pipe fittings 13 simultaneously, so that the packing can descend evenly, facilitating the discharge of the packing and timely replacement of new discharge materials.

[0027] The working principle of the present invention is as follows: After the gas enters the interior of the equipment main body 1 from the air inlet 8, the gas flows along the ventilation channel 3, and at the same time passes through the inner separation plate 5 and the outer separation plate 4 to fully contact the filler, realizing the catalytic reaction of the gas, purifying the gas. And after the gas flows in the ventilation channel 3, it must pass through multiple inner separation plates 5 and outer separation plates 4, so that the gas contacts the filler. At the same time, the filler channel 2 adopts two groups of spiral structures that are rotationally symmetric about the center, greatly increasing the flow path of the gas, ensuring that the gas can fully contact the filler, ensuring the purification treatment effect of the gas, while improving the purification efficiency of the gas, and also being able to reduce the use of the filler, reducing the usage amount of the catalyst, further reducing the operation cost of the gas. The equipment specifications can be flexibly adjusted, with strong purification processing ability, and can be applied to large-scale gas purification equipment. Compared with the cylindrical type and the square plate type, it can be made large-scale, can greatly increase the reaction area and the filtration area, reduce the gas-solid two-phase resistance, reduce the equipment height and floor area, and achieve better reaction effects with lower investment; it is easier to achieve multi-stage, realize multiple gas reactions and multiple redistributions, improve the gas-phase reaction effect, and can greatly increase the solid-phase utilization rate, saving the use cost of solid-phase materials; it is easier to integrate dust removal and reaction, and can replace solid materials arbitrarily without affecting the gas phase and the overall reaction.

[0028] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An efficient large-scale spiral plate gas purification device, comprising a device main body, characterized in that: Inside the device main body, there are two sets of packing channels distributed in a spiral manner. Between the two sets of packing channels, two spiral-structured air channels are formed in cooperation. The two sets of packing channels are rotationally symmetrically arranged around the center. The packing channel is separated by a spiral-structured outer separation plate and an inner separation plate. Both the outer separation plate and the inner separation plate are air-permeable plates. A sealing plate is fixedly connected to the periphery of the two sets of outer separation plates and inner separation plates that cooperate with each other inside and outside, and the sealing plate is fixedly connected to the inner wall of the device main body and divides the device main body into two outer chambers. The two outer chambers are respectively communicated with the air channel. An air inlet and an air outlet corresponding to the two outer chambers are provided on the device main body. Spiral-structured plugging plates are fixedly connected to the upper and lower ends of the outer chamber and the cooperatively communicated air channel. The plugging plate is used to seal the upper and lower ends of the outer chamber and the air channel. The upper port of the packing channel is provided with two sets of spiral-structured and obliquely symmetrically arranged material blocking plates. The tops of the two sets of material blocking plates are fixedly connected to form a pointed angle structure. The two sets of material blocking plates form a flared structure on both sides of the packing channel, facilitating the filling material to enter the packing channel.

2. An efficient large-scale spiral plate gas purification device according to claim 1, characterized in that: At least one set of spiral-distributed baffles is respectively arranged in the two outer chambers and the cooperatively communicated air channels. The baffles are arranged staggeredly along the height direction.

3. An efficient spiral plate large-scale gas purification device according to claim 1, characterized in that: The lower end of the packing channel is provided with a spiral-distributed discharging pipe fitting. The discharging pipe fittings are connected in sequence in a butt joint manner. The discharging pipe fitting is a necking pipe fitting composed of discharging plates of different shapes. The discharging pipe fitting is fixedly connected to the bottom plugging plate.

4. An efficient spiral plate large gas purification device according to claim 1, characterized in that: The upper and lower ends of the device main body are respectively fixedly connected with a feeding assembly and a discharging assembly. The feeding assembly feeds materials to the upper end inside the device main body in a multi-point feeding manner. The discharging assembly discharges materials in a multi-point discharging manner and converges and concentrates before discharging.

5. An efficient spiral plate large-scale gas purification device according to claim 1, characterized in that: The middle parts of the outer separation plates and the inner separation plates of the two sets of packing channels are butted and the two sets of packing channels are communicated with each other.

6. An efficient spiral plate large-scale gas purification device according to claim 1, characterized in that: The air inlet and the air outlet are respectively arranged at the upper and lower ends of the device main body and are at different ends.

7. An efficient large-scale spiral plate gas purification device according to claim 1, characterized in that: A gas guide plate is fixedly connected between the side of the sealing plate close to the inner separation plate and the inner wall of the device main body.

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